DWDM TECHNOLOGY PALTEL TOPLOGY FOR PALESTINE Prepared by: Nermeen Saleh ,Salma Soufan ,Dima Khalil Under Supervision of : Dr.Yousef Dama DWDM Technology PALTEL Topology 1 DWDM network design REVIEW Running out of bandwidth Software implementation 1 2 3 4 TABLE OF CONTENTS 2 3 REVIEW WHY DWDM ?! The world of telecomm-unication networking is changing rapidly. Where once we had kilobits, we now demand megabit and gigabits. And soon the world will start using terabits. WHAT is DWDM?! is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light. This technique enables bidirectional communications over one strand of fiber, as well as increasing the capacity of the system. DWDM Equipments 1-Transponder/Muxponder Transceivers 2-MUX/DEMUX 3-Amplifiers 4- ROADM(Optical Add Drop Multiplexer). 3 4 Designing a DWDM point to point link or a ring requires some specifications that needs to defined before starting implementation Total Capacity 440Gbps Number of channels 44 Data rate of each channel 10Gbps Target BER Target OSNR at the receiver 20-30 dB DWDM Network Design and Numerical Calculations INTRODUCTION TARGET DESIGN SPECIFICATIONS 4 89 5 Where: is the wavelength and it is 1550 nm C is the speed of light 3*10^8 D is the dispersion coefficient 17 ps/nm.km Bo is the data rate of each channel λ . This means that the signal can pass 18.5km without the need for dispersion compensation and so in our case since the distances are larger than 18.5 a card called DCM(dispersion compensation module) must be used The first step is to measure the distance that a signal can pass without the need for dispersion compensation according to the following equations that find the spectral line width then use it to find the maximum distance ( DETERMINE THE DISPERSION LIMITATION OF THE SYSTEM 5 6 NORTH RING DESIGN Total Distance=63 Km Find Number of Segments (N) Find the received Power Since the total distance is 63(small) the amplifier span= 63Km Now, find min input power of the amplifier Find the span loss to find the gain of the amplifier Calculate the OSNR System needs Amplification NABLUS-AZZON NUMERICAL CALCULATIONS 6 8 Link Name = Estimated Loss OSNR Nablus-Jenin 59.5km -22.95 23.875 30 Jenin-Tolkarem 60km -22.95 24 30 Tolkarem-Azzon 31km -14 ----- ----- Azzon-Nablus 63km -23.8 24.85 29.15 For Tolkarem- Azzon link, it was found that the signal can reach it’s distention without the need for optical amplifier since the distance is 31 Km North Ring Design Results 7 9 In a world where mobile device network additions are growing faster than the population, and machine2mchime device network additions are also growing faster than mobile device additions. The problem of bandwidth is clearly becoming highly important and requires a good solution. So not only does the network needs to grow, but it also needs to grow more cost effectively. WE ARE RUNNING OUT OF BANDWIDTH INTRODUCTION 8 Data granularity: There are two solutions available for providing higher bandwidth and so solve the problem of higher bandwidth. Replace the 44 wavelength with 88 wavelengths Replace the 10g cards with 100g cards which cost less to deploy 10 11 Solution number 1 Replace the 44 wavelength with 88 wavelengths PROS CONS more robust to channel impairments requires low OSNR more flexible new equipment installations planning and deployment costs Despite the adavntages mentioned before , it is not very recommended because changing the whole infrastructure is not an easy task and costly. 11 Solution number 2 Replace the 10g cards with 100g cards This solution requires multiplexing ten 10gig wavelengths to produces 1 100gig wavelength by using a 100G muxponder cards. Deploying a 100gig signal requirements: the OSNR must be improved more resilience to chromatic dispersion the signal must be squeezed in to the 100 Gig spacing 10gig signal VS. 100gig signal The spectral width of a 100G OOK signal is ten times larger than 10G OOK signal, making it too wide to pass through DWDM filters without excessive penalties The necessary modulator, driver and receiver electronics to attempt 100G OOK transmission are difficult to fabricate, making them hard to source and prohibitively expensive chromatic dispersion limits transmission reach to a few kilometers before regeneration is required HOW TO SLOVE THE ABOVE PROBLEMS? deploy a DP-QPSK modulation scheme. 12 After solving the problems mentioned above we must decide whether to use the 100gig signal or change to 10gig with 50GHz spacing(44 wavelengths) PROS the service provider has effectively extended the life of the existing network and remaining bandwidth by up to 10 times 13 Feasibility study for the 100g deployment in DWDM network In the 10G system, each 11 STAR card costs 7,000$. So to establish a link between two points, the cards will cost 14,000$. in 100G system each port on the costs 1500$. In our network, Med1-Swaimeh link carries 25 wavelengths. Such link will cost 25*14,000=350,000$.these 350,000 are not wasted since they can be reused in another node in case the demand increased. To carry 25 wavelengths, two ports will be fully utilized ,and the third one will be half filled, the total cost will be (2*10*1500+5*1500)*2= 75,000$ This solution will save 312,500$. In this way, we have stayed in budget and scaled the network to meet the increasing demands at the same time 14 TO BE HAPPY JUST MOVE TO THE 100gig SIGNAL SOLUTION 15 APPLICATION IMPLEMENTATION INTRODUCTION This application is implemented based on JAVA language for the purpose of monitoring the DWDM network it supports five different modules that are shown below NEW ROUTE CONTROL PANEL FIBER CUT LINK DESIGN UTILIZATION 16 Planning the network and determine the services Implementing the database Choosing a routing algorithm Lamda and path assignment Design Steps For The Software 17 The Functionalities and the modules of the software are shown in the following demo 18 Conclusion In this project we have achieved the following We have completed the third phase of PALTEL PLAN for DWDM network design in Palestine We have improved the network and founded a solution for enhancing the capacity of the network We have implemented a software for the purpose of monitoring and managing the DWDM network 19 image2.jpeg image3.png image4.gif image5.jpeg image6.png image7.png image8.png image9.png image10.png image11.png image12.png image13.png image14.jpeg image15.png image16.png image17.png image24.png image25.png image26.png image27.png image28.png image29.png image1.png image18.png image19.png image20.png image21.png image22.png image23.png image30.png image31.png image32.png image33.png image34.png image35.jpeg image36.png image37.jpeg image38.png image39.png image40.jpeg image41.png /docProps/thumbnail.jpeg